I've completed a pair of deployed 2pdrs along with their associated portees. The 2pdrs are all Zvezda and the portees converted Airfix Austin Fire Tenders.
The main points of assembly are seen in the progress picture. The white or dark grey parts are from the original Airfix kit, the mid grey from an Airfix QLT and the brown from the Zvezda. Note it was easier to cut and fit the undeployed sub-frame for the gun